Turbine.



No.76fi293. PATENTED AUG.2,19OL

J. STUMPF.

TURBINE.

APPLICATION FILED NOV. 7, 1903.

N0 MODEL.

E Mi 0 p 13, C 2 {g SE; a L J W1 71w 11815155.- [NVE/V TOR :9 f WPatented August 2, 1904.

UNITED STATES PATENT OFFICE.

JOHANN STUMPF, OF CHARLOTTENBURG, NEAR BERLIN, GERMANY, ASSIGNOR TOGENERAL ELECTRIC COMPANY, A CORPORATION OF NEIV YORK.

TURBINE.

SPECIFICATION forming part of Letters Patent No. 766,293, dated August2, 1904. Application filed November 7,1903. Serial No. 180,267. (Nomodel.)

To all whom it may concern:

Be it known that I, J OHANN STUMPF, a subject of the King of Prussia,German Emperor, and a resident of 27 Rankestrasse, Charlottenburg, nearBerlin, Kingdom of Prussia, German Empire, have invented certain new anduseful Improvements in Steam or Gas Turbines, of which the following isan exact specilication.

My invention relates to steam or gas turbines, and more especially toturbines with at least two turbine-wheels, which are situated so thatthe driving medium after passing the first turbine-wheel flows directlyor under mediation of a guiding apparatus into the second turbine-wheelin which the energy of the driving medium is further utilized, thesecond turbine-wheel rotating in a direction opposite to the directionin which the first turbinewheel rotates. In such turbines a third,fourth, and so on, turbine-wheel may be arranged; but it will beunderstood that all turbine-wheels which are situated at the side of oneanother rotate in opposite directions. Such turbines are advantageouslyused for driving several screw-propellers or several dynamo-machines,ventilators, centrifugal pumps, and the like,

which may be coupled in series or parallel.

In all these turbines in case the turbine or any part of the machinescoupled to the same is damaged the whole working of the turbine must beinterrupted. In order to do away with this disadvantage, I provide mynew invention, which consists in providing means for holding one orseveral turbine-wheels fast, so that the same cannot rotate. If, forinstance, in a turbine for two dynamo-machines coupled parallel, whichturbine has two turbine-wheels rotating in opposite directions, each ofwhich turbine-wheels develops fifty per cent. of the total energy of theturbine it occurs that, for instance, by the damaging or burning of adynamo-armature one of the dynamo-machines gets out of order, it ispossible to stop the movement of that part of the turbine which drivesthe damaged dynamo-machine, while the other part of the turbine remainsat work.

It will be understood that special means may be provided for stoppingeach turbine-wheel, which means may be constructed in any convenient wayso, for instance, the turbine-wheels or the shafts of the same may beheld fast by means of screws, wedges, or the like or, as shown in theaccompanying drawing, by arranging special wheels e, provided with holes6 upon the shafts c and (Z of the turbine-wheels e and f, which wheelscan be held fast by means of pins g, to be shifted into the holes 7).The effect of the turbine-wheels which remain at work, if the movementof the other ones is stopped, is not at all changed by the stopping ofthe turbine-wheels. If, for instance, the primary turbine-wheel isstopped, the vanes of this turbine-wheel serve as guide-blades for thesteam for the second turbine-wheels. In

case of several turbine-wheels rotating alternately in one or in theopposite direction the first, third, fifth, and so on, turbine-wheelsserve after stopping the movement of the same as fixed guide-blade rimsfor the second, fourth, and so on, turbine-wheels.

It will be clear that it is very important for nearly all factories tobe able to stop only part of the driving-machine in case repairs arenecessary.

Having thus fully described the nature of this invention, what I desireto secure by Letters Patent of the United States is 1. In steam or gasturbines, the combination with two turbine-wheels rotating in oppositedirections, oppositely-projecting shafts with notched devices on saidshafts for preventing the movement of one turbine-wheel, while the otherone rotates, substantially as described and for the purpose set forth.

2. In steam or gas turbines, the combination of several turbine-wheelsrotating alternately in opposite directions, oppositel v-projectingVshafts and notched devices on said shafts for stopping the movement ofeach turbine-wheel, while the other ones rotate, substantially asdescribed and for the purpose set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

J OHANN S'IUMPF.

IVitnesscs:

HENRY HAsrnR, WOLDEMAR HAUPT.

